From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A124BC43387 for ; Tue, 18 Dec 2018 00:09:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 71019214C6 for ; Tue, 18 Dec 2018 00:09:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="QH4vgcsh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726402AbeLRAI7 (ORCPT ); Mon, 17 Dec 2018 19:08:59 -0500 Received: from mail-pf1-f195.google.com ([209.85.210.195]:42605 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726260AbeLRAI6 (ORCPT ); Mon, 17 Dec 2018 19:08:58 -0500 Received: by mail-pf1-f195.google.com with SMTP id 64so7168253pfr.9 for ; Mon, 17 Dec 2018 16:08:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id; bh=G8WsvbXl+iLBLo+fDvmVSgQWNa3uWGPsiAkN1qPpBqE=; b=QH4vgcshZusAdSCW0F5FiOpo9B+4Yt5vdugPRb4BaCNecdKK8TLR1aatsZrJLbxGSV nhLHCsobHgZm/6oiagEYfWTEjTitZQ57FcglzGsIKs7eVfUSNXc5IV9IPo6hv7uFXEGa o0C0xPDF2Eo9SwWDdw4EK4VvHqGgXb2mHpexk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=G8WsvbXl+iLBLo+fDvmVSgQWNa3uWGPsiAkN1qPpBqE=; b=k77CQTVsGkdqo9WoCwcXPOTlLx1qEkoA4vh7jJQyrOpszf7/EyCd7pCIVEhhSbOzUK bqXLgRJCiNZIMfSPNey515w+nVIIJf4UA+EPw39V3rdPS32Dqea3I0OfRMPXwMPdYtpS NuQYvvmQNhtx+YH92DsrxKiWqh505QlURuH2zU+7FEKvf2lCh3BjvdfTqaImw1BUqUJx P+8k9jR/x4k8kvchX7UUN7N4em70XXx5R2Lf2+WXQ9HmMZRz9Of7x+Wh7dIQy7TBRE+z Z3u1KPBjBYYD4RHcXI7Uy1XeTKBjazm9ukSkQkXRmkMEYKKJMgvohB20r30sFmdoHtQs 0yxQ== X-Gm-Message-State: AA+aEWafell59yWoG15zE8m/4wChiXKTkstFpGqWXduo1vh7882hqE8D +3EzBqC3ZNNAfxDvz3Z+WeqBTw== X-Google-Smtp-Source: AFSGD/Vtp8QvZxyBxOKBPmf2IJVrVJpeHR6lM19Ck+5Seuw+JHouK2hO0rY4tnB7REsYvrQxhzU1Cw== X-Received: by 2002:a63:3204:: with SMTP id y4mr13834880pgy.41.1545091738176; Mon, 17 Dec 2018 16:08:58 -0800 (PST) Received: from evgreen2.mtv.corp.google.com ([2620:15c:202:201:ffda:7716:9afc:1301]) by smtp.gmail.com with ESMTPSA id m65sm21734424pfg.180.2018.12.17.16.08.57 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 17 Dec 2018 16:08:57 -0800 (PST) From: Evan Green To: Andy Gross , Bjorn Andersson Cc: Brian Norris , Ben Chan , Evan Green , linux-arm-msm@vger.kernel.org, David Brown , linux-kernel@vger.kernel.org Subject: [PATCH v1 0/2] soc: qcom: rmtfs-mem: Support non-root rmtfs daemons Date: Mon, 17 Dec 2018 16:08:32 -0800 Message-Id: <20181218000834.201748-1-evgreen@chromium.org> X-Mailer: git-send-email 2.18.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series contains minor fixes needed to better support running an rmtfs daemon from an unprivileged process: - Enable uevents on the child character device by adding a struct class to the parent. I needed these so that I could change the ownership of /dev/qcom_rmtfs_mem1, and drove myself crazy trying to understand why my udev rules never fired. - Enable access to phys_addr and size sysfs attributes. The daemon needs to read these, and they don't really contain anything sensitive, so expose them. I still need CAP_NET_ADMIN to be able to bind to the right qrtr port, but at least with these changes I can run as a different user, and drop all other privileges. Evan Green (2): soc: qcom: rmtfs-mem: Add class to enable uevents soc: qcom: rmtfs-mem: Make sysfs attributes world-readable drivers/soc/qcom/rmtfs_mem.c | 29 +++++++++++++++++++++-------- 1 file changed, 21 insertions(+), 8 deletions(-) -- 2.18.1